Hokkaido Nippon-Ham Fighters vs Chiba Lotte Marines Hokkaido Nippon-Ham Fighters
Nippon Ham Fighters win the game. Listed on both Kalshi and Polymarket; recorded continuously since Aug 23, 2026. Live.
Price history, both venues (7 days)
Data table
| time (UTC) | polymarket mid |
|---|---|
| Sep 18 10:20 | 27.0% |
| Sep 18 20:05 | 27.5% |
| Sep 18 22:25 | 27.5% |
| Sep 19 07:30 | 27.5% |
| Sep 19 08:35 | 27.0% |
Mid price of the YES side per venue, 5-minute buckets, from continuously recorded order books. Breaks mean the recorder was down or a book was empty.
Related markets on both venues
Frequently asked questions
What are the current Kalshi and Polymarket odds for "Hokkaido Nippon-Ham Fighters vs Chiba Lotte Marines Hokkaido Nippon-Ham Fighters"?
As of the latest recorded books, Kalshi's YES mid is 0.0¢ (bid —, ask —) and Polymarket's is 27.0¢ (bid 0.04, ask 0.5) — a —¢ gap. Prices are recorded continuously; this page refreshes every few minutes.
Has this market been an arbitrage?
Not yet — the two venues have not disagreed by more than the combined fees at a fillable size since we began recording.
Do both contracts resolve the same way?
The pair was confirmed as the same question (AI-matched · 95%). That judgment covers the headline question; resolution rules can still differ in edge cases (sources, timing, ties). Read both venues' rules before treating a gap as risk-free.
What do the fees do to the gap?
Kalshi charges takers 7% × price × (1 − price) per contract; Polymarket charges its category rate on the same curve. Near 50¢ that is roughly 1.75¢ per contract on Kalshi and 1–1.75¢ on Polymarket, so a visible gap of 3–4¢ is typically the minimum before anything is left.
← every Kalshi↔Polymarket pair · resolution criteria · taker fees · match: AI-matched · 95%. Verify both markets' rules yourself; this is data, not advice.